diff options
| author | Kenneth Graunke <[email protected]> | 2016-08-09 01:44:38 -0700 |
|---|---|---|
| committer | Timothy Arceri <[email protected]> | 2017-01-09 12:32:16 +1100 |
| commit | 3371de38f282c77461bbe5007a2fec2a975776df (patch) | |
| tree | 567a4758b4e8429d1821104bf40ca04beb140229 /src/compiler/nir | |
| parent | 1c50d31c2613ec41d53fc784c59708e4d271f9b4 (diff) | |
nir: Turn bcsel of +/- 1.0 and 0.0 into b2f sequences.
On BDW:
total instructions in shared programs: 13074882 -> 13068703 (-0.05%)
instructions in affected programs: 1823116 -> 1816937 (-0.34%)
helped: 4187
HURT: 537
total cycles in shared programs: 256622718 -> 256425382 (-0.08%)
cycles in affected programs: 123790120 -> 123592784 (-0.16%)
helped: 3823
HURT: 2037
total spills in shared programs: 15276 -> 14929 (-2.27%)
spills in affected programs: 9446 -> 9099 (-3.67%)
helped: 352
HURT: 1
total fills in shared programs: 20496 -> 20144 (-1.72%)
fills in affected programs: 13040 -> 12688 (-2.70%)
helped: 352
HURT: 1
LOST: 2
GAINED: 21
v2: Rely on 'a' being a well-formed boolean (Connor, Eric).
Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Timothy Arceri <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
Diffstat (limited to 'src/compiler/nir')
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index 3b8836e6be8..434881f85bf 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -269,6 +269,10 @@ optimizations = [ (('ieq', 'a@bool', False), ('inot', 'a')), (('bcsel', a, True, False), a), (('bcsel', a, False, True), ('inot', a)), + (('bcsel@32', a, 1.0, 0.0), ('b2f', a)), + (('bcsel@32', a, 0.0, 1.0), ('b2f', ('inot', a))), + (('bcsel@32', a, -1.0, -0.0), ('fneg', ('b2f', a))), + (('bcsel@32', a, -0.0, -1.0), ('fneg', ('b2f', ('inot', a)))), (('bcsel', True, b, c), b), (('bcsel', False, b, c), c), # The result of this should be hit by constant propagation and, in the |